Thermal-Hydraulic Analysis Under LOFA Hypothesis of a Plate-Type Fuel Surrounded by Two Water Channels Using Relap5 Code
Itamar Iliuk1; José Manoel Balthazar2; Angelo Marcelo Tusset3; José Roberto Castilho Piqueira1
1 EPUSP; 2 ITA; 3 UTFPR
doi:10.20906/CPS/COB-2015-0900
Resumo
Thermal-Hydraulic analysis of plate type fuel has great importance to the establishment of safety criteria, also to the licensing of the future nuclear reactor with the objective of propelling the Brazilian nuclear submarine. In this work an analysis of a single plate-type fuel surrounding by two water channels was performed using the RELAP5 thermal-hydraulic code. To realize the simulations was proposed a plate-type fuel with the meat of uranium dioxide UO2 sandwiched between two Zircaloy-4 plates. A PLOFA (Partial Loss of Flow Accident) was simulated to show the behavior of the model under this severe type of accident. The results show that the CHF (Critical Heat Flux) was detected in the central region along the axial direction of the plate when the right water channel was blocked.
Palavras-chave: RELAP5; Thermal-Hydraulic; Plate-Type Fuel; LOFA; Critical Heat Flux